It's no coincidence that that knuckle is the largest and most awesome.

Lord Krishna said: I am terrible time the destroyer of all beings in all worlds, engaged to destroy all beings in this world; Of those heroic soldiers presently situated in the opposing army, even without you none will be spared.Bhagavad Gita 11:32

its abnormally bigger than the other ones. I remember being younger and not being this disporportional. Because my other two knuckles and fingers curl more than the other two just like a chick's, the other two knuckles contact much less. I think the build-up is to compensate. pending hand pain when I get older..

1) If you punch across your body into your own cupped hand all your knuckles are hitting at one no matter what.

2) Occam's Razor?

1) ... :cry: If only you knew how stupid that statement was...
Simply put, You can punch into your own cupped hand with a phoenix fist/panther/etc if you wanted to you know...

You obviously haven't been watching, from 0:34~0:39, he shows a slowed version smacking into his own open hand, he rotates his fist outward and upward circular motion, typical of strikes with the last 3 knuckles/fingers (CMA, sunfist/wc punch) rather than downwards and towards the body, which is typical of strikes using 1st two knuckles/fingers (krotty punch/phoenix/dragon/panther/etc).

You'll also notice that he demo punches corkscrews clockwise which ends the thumb pointing outwards and fingers pointing upward if rotation is done 180°.

In a krotty punch, which traditionally uses the 1st two knuckles, the punch corkscrews anti-clockwise which ends the thumb pointing into the body and fingers pointing downward if rotation is done 180°.

Hope this helps.

2) Last I checked, you were the one confused on how it was possible Muhammed Ali could have developed first two knuckles. The answer is he crossed trained.

the interview explaining the "accupunch" is not edited, Muhammed striking his palm with his last 3 fingers seals it for me. I provided evidence, feel free to prove otherwise.

in that video he strikes with the middle knuckle, and then twists it so that as his fist leaves his palm the last two knuckles touch. it doesn't prove anything, other than you should have used another source.

Oh and BTW i find it very hard to beleive that a professional boxer would cross train to the extent where it conditioned his hands. A boxer's hands are his tools he can't afford to **** around with them

Bare knuckle boxing series on youtube.com
I've messaged the channel owner for information on the video.
I've linked him to this thread.

From 0:42~0:56, the speaker's index knuckle does not contact on the partner, but rather into space. This is especially visible when 0:52, he talks about hitting the shoulder and does a sunfist. 1:51, the same sunfist to smash into the partner's guard. Again the index finger and thumb are not contacting the partner. Cockscrew punches done all land with the last 3 knuckles. This is repeated throughout the 10min clip.

The screenshots hopefully will tell you the posture and striking angle are not optimal for landing with the 1st two knuckles neither are they used in the clip.